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Formula: AgPb7Sb5S15
Sulphosalt, antimony-bearing mineral
Crystal System: Monoclinic
Specific gravity: 6.255 calculated for the empirical formula
Hardness: 2 to 2½
Streak: Grey
Environments
Chukotkaite is a relatively new mineral, approved in 2019 and to date (February 2024) reported only from the
type locality.
Localities
At the type locality, the Levyi Vulvyveem river valley, Amguema river basin, Iultinsky District, Chukotka Autonomous
Okrug, Russia, chukotkaite was found in a single rock sample containing a rich
sulphide-sulphosalt assemblage. The chukotkaite forms anhedral grains up to 0.4 x 0.5 mm intergrown with
pyrrhotite, sphalerite,
galena, stannite,
quartz, and manganese -
iron - bearing clinochlore. Other
associated minerals include arsenopyrite,
benavidesite, diaphorite,
jamesonite, owyheeite and
uchucchacuaite,
cassiterite and
fluorapatite.
Chukotkaite is lead-grey, opaque, and has metallic lustre and a grey streak
(CM 58.5.587-596).
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